OOO archive --- DEF CON CTF [ login ]

dc2021q - baby-a-fallen-lap-ray pwn

by adamd, zardus

This was a jeopardy challenge, part of dc2021q. (CTFtime)

This challenge was represented as 👶
Points: 209
Was solved by: 13 teams

You may spawn the server:

On your laptop
  • Install docker
  • docker pull archiveooo/pub:baby-a-fallen-lap-ray (docker-saved download)
  • docker run -d --name baby-a-fallen-lap-ray archiveooo/pub:baby-a-fallen-lap-ray
  • Local IP: docker inspect baby-a-fallen-lap-ray -f '{{ .NetworkSettings.Networks.bridge.IPAddress }}'
  • Connect to that IP:5000 — Remember to docker rm -f when done.
On your laptop (full source)
  • Install docker and pip install PyYAML coloredlogs
  • git clone (notice below)
  • cd baby-a-fallen-lap-ray
  • ./spawner --log-level=INFO
  • Connect to the ip:port displayed
Hosted by OOO Right now we're asking players to login first.


Return of the parallel machine. Or is it? Flag is in current directory called flag.

Once you've solved this, move on to mama-a-fallen-lap-ray and gran-a-fallen-lap-ray :)

line_weight baby-a-fallen-lap-ray.tar.gz


None yet :(
If you wish, you can contribute some.


Spoilers ahead! Code for this challenge is publicly available. Includes all three versions.